1. What is the most abundant element of Earth's atmosphere?

A stand shows a pendulum in 5 positions. A has the pendulum bob at a 45 degree angle to the left. C has the pendulum bob straight down, and B is halfway between A and C.

A ball is thrown horizontally from the roof of a building 56 m tall and lands 45 m from the base. What was the ball's initial speed?

Which of the following best describes a longitudinal wave? A. a wave which is caused by regularly repeating disturbance of the medium B. a disturbance that moves the medium along its line of travel c.

This scientist focused his study on planetary motion. One of his laws is the planets orbit the Sun in elliptical patterns. Hubble Kepler Newton Copernicus

A person pushes a 16.0 kg lawn mower at constant speed with a force of 87.5 N directed along the handle, which is at an angle of 45.0 to the horizontal.

A person catches a ball with a mass of 145 g dropped from a height of 60.0 m above his glove. His hand stops the ball in 0.0100 s. What is the force exerted by his glove on the ball? Assume the ball slows down with constant acceleration.

State the law of conservation of energy in your own ords

The malfunction indicator light in an OBD II system is flashing. Technician A says that this simply indicates a soft failure. Technician B says this means the problem could be damaging the catalytic converter. Who is right? A. Technician A only B.

What are some methods humans have used to control flooding and what has been done to worsen the effects of flooding?

Suppose an electron is moving with a constant velocity until it encounters a positively charged sphere on its right. How does the sphere alter the trajectory of the electron? a. It has no effect on the trajectory of the electron b.